Diamond Fighter IV
Since the game documentation is in German here are the short game instructions and it's all you need to play the game:
Mediatype softwareCreator Master CreatingIdentifier DiamondFighterIvAddeddate 2012-10-22 01:24:33Date 1998Year 1998License freewarePublicdate 2012-10-22 01:25:06Backup_location ia903909_31
You start the game with DF4.BAT.
You pick a level by picking a USA state. I think the goal is to finish all the states (figures). Goal of each level is to collect all the diamonds and return to the starting position.